Just got my letter from BCBS yesterday - I must be somewhat lucky, as mine's only going up $20 a month after the first of the year. It typically jumps about that much every quarter, but this time they referenced fees associated with the Affordable Care Act.
I think if your plan was in effect before March 23, 2010 it is grandfathered in. That is where I'm at and I'm only going to pay $20 per month until they find out about a couple "fees". ACA will not allow any riders to be added and retain grandfathered status however. Guess I'm being rewarded for not shopping around for the cheapest insurance for a few years.